/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
 * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
 * to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package org.apache.tuweni.bytes;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkElementIndex;

import io.netty.buffer.ByteBuf;

final class MutableByteBufWrappingBytes extends ByteBufWrappingBytes implements MutableBytes {

    MutableByteBufWrappingBytes(ByteBuf buffer) {
        super(buffer);
    }

    MutableByteBufWrappingBytes(ByteBuf buffer, int offset, int length) {
        super(buffer, offset, length);
    }

    @Override
    public void clear() {
        byteBuf.setZero(0, byteBuf.capacity());
    }

    @Override
    public void set(int i, byte b) {
        byteBuf.setByte(i, b);
    }

    @Override
    public void setInt(int i, int value) {
        byteBuf.setInt(i, value);
    }

    @Override
    public void setLong(int i, long value) {
        byteBuf.setLong(i, value);
    }

    @Override
    public MutableBytes mutableSlice(int i, int length) {
        int size = size();
        if (i == 0 && length == size) {
            return this;
        }
        if (length == 0) {
            return MutableBytes.EMPTY;
        }

        checkElementIndex(i, size);
        checkArgument(
                i + length <= size,
                "Provided length %s is too big: the value has size %s and has only %s bytes from %s",
                length,
                size,
                size - i,
                i);

        return new MutableByteBufWrappingBytes(byteBuf.slice(i, length));
    }

    @Override
    public Bytes copy() {
        return Bytes.wrap(toArray());
    }

    @Override
    public MutableBytes mutableCopy() {
        return MutableBytes.wrap(toArray());
    }

    @Override
    public int hashCode() {
        return computeHashcode();
    }
}
